250 



GLOSSARY. 



decumbent, like one of the leafy 

 lichens (as Peltklea). 



Linear : lon<^ and narrow, \\'\i\\ pa- 

 rallel sides. 



Lobe: one of the portions of a 

 deeply cut frond. 



Lobule : a diminution of lobe. 



Matrix : that from which something 

 else is formed or developed. 



Membranaceous : thin and filmy ; 

 also (when applied to substance), 

 soft and tender, but not gelati- 

 nous. 



Metamorphosed : changed in ap- 

 pearance, or converted to another 

 purpose. 



Mitriform, : shaped like a bishop's 

 mitre, or like a loaf of sugar. 



Moniiiform : like a string of beads. 



Moncecious : having stamens and 

 pistils (or antheridia and spores) 

 on the same root, but not in the 

 same flower or conceptacle. 



Mucronate : having a small pro- 

 jecting point, or mucro. 



Mucus : organic gelatine or slime. 



Nemathecium : a wart-like protu- 

 berance composed of vertical fila- 

 ments closely packed together. 



Node : a joint or interruption in a 

 stem. 



Nodose : with swollen joints. 



Normal : regular, orderly. 



Ob : used as a prefix to a word, 

 mean, contrarywise ; as ob-ovate, 

 the reverse of ovate, &c. 



Oblong: broadly linear. 



J " '^  [ the reverse of transparent. 

 Opaque : ) 



Orbicular : circular, round. 



Order : a group of plants consisting 

 of numerous Genera ; the next 

 division under a Class. 



Ovate : broad at one end and nar- 

 rowed towards the other, like the 

 outline of an egg. 



Palmate : divided, like a hand, into 

 several finger-like lobes. 



Papillated : covered with little nip- 

 ple or wart-like prominences, call- 

 ed papillce. 



Paranemata : filaments which ac- 

 company spores in the fructifica- 

 tion of many Algae. (See page 9). 



Paraphyses : distended paranemata ; 

 also applied to abortive spores. 



Parasitic : growing on another 

 plant, and subsisting on nourish- 

 ment derived from it. 



Parietal : attached to the wall or 

 lining of a cell or conceptacle. 



Pat.ent : spreading, oj)en. 



Pectinated : arranged as the teeth 

 of a comb. 



the stalk of the fruit. 



Peduncle 



distant 



Pelagic : growing in many 

 parts of the ocean, widely dis- 

 persed. 



Penninerved (leaf or frorul) : when 

 the nerves are placed at each side 

 of the midrib like the plumes of 

 a feather. 



Percurrent : running through from 

 top to bottom. 



Pericarp : the seed-vessel, or case 

 in which spores are lodged, or the 

 walls of the same. 



Peripheric : belonging to the outer 

 stratum or periphery. 



Peripheri/ : the circumference, or 

 outer stratum of cells in a cylin- 

 drical frond. 



Perispore : the case or skin which 

 surrounds the spore. 



Phi/llodium : a flaltened, leaf-like 

 portion of the frond. 



Pinna : one of a series of opposite 

 or alternate, distichous branchlets. 



Pinnule : a secondary pinna. 



Pinnated : furnished with distichous 

 leaves or branchlets, ranged like 

 the plumes of a feather. 



Pinnatifid : deeply incised in a se- 

 mipiunate manner. 



Placenta : the part to which the 

 spores are attached. 



Plumule : a pinnated branchlet. 



Polygonal: having many angles. 



Polyhedral : having many sides. 



Polymorphous : assuming many 

 shapes. 



Process : any prominence or pro- 

 jecting part, or small lobe. 



